Heating apparatus.



P. CRAIG.

HEATING APPARATUS.

APPLICATION FILED 11mm, 1913.

1,081,891. Patented Dec. 16,1913.

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P. CRAIG.

HEATING APPARATUS.

APPLICATION FILED APILB, 191s Patented Dec. 16, 1913.

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FREDRICK CRAIG, OF KNIGHTSTOWN, INDIANA.

HEATING APPARATUS.

Specification of Letters Patent.

Patented Dec. 16, 15H 0.

Application filed April 8, 1913. Serial No. 759,694.

To all 107mm it may concern:

Be it known that I, FREDRICK CRAIG, a citizen of the United States, residing at Knightstown, in the county of Henry and State of Indiana, have invented new and useful Improvements in Heating Apparatus, of which the following is a specification.

This invention is an improved heating apparatus, especially adapted for use in connection with the ordinary smoke pipe of a stove or furnace to utilize the heat of the smoke and products of combustion in the smoke pipe for heating air for delivery at some point in a house or apartment, thus effecting an economy of fuel and greatly increasing the comfort of the house in which the heating apparatus is installed, the invention consisting in the construction, combination and arrangement of devices, here inafter described and claimed.

In the accompanying drawings: Figure 1 is partly an elevation and partly a sectional view of the heating apparatus constructed in accordance with my invention, showing the same in connection with an ordinary smoke pipe, the latter being indicated also partly in elevation and partly in section. Fig. 2 is a vertical sectional view in detail on the plane indicated by the line aa of Fig. 1. Figs. 3 and 4 are detail sectional views on the planes indicated by 6-?) and cc, respectively, of Fig. 1. Fig. 5 is a detail sectional view on the plane indicated by the line ZZ of Fig. 1. Fig. 6 is a detail plan of the scraper.

For the purposes of this specification, a smoke pipe of an ordinary stove or furnace is indicated at 1 connected at its upper end, as at 2, to a flue or chimney 8, and provided with an elbow t. In accordance with my invention, I provide a drum 5 which is connected to the lower end of a vertical section of the stove pipe 1, and is provided at its upper end with a collar or connector 6 for attachment of the stove pipe 1, and is also provided at its lower end with a connector or collar 7 for the attachment of another length of stove pipe, so that the drum, when installed, is arranged at an intermediate point in the smoke pipe, and all of the smoke and products of combustion from the stove or furnace pass through the drum, as well as through the pipe. In one side of the drum is a circular connector 8, to which is attached an externally arranged elbow 9 which forms a portion of an air heating duct. An elbow 10 is arranged in the drum and passes through the top thereof and is attached, as at 11, to the elbow 9, said elbows being provided with coengaging flanges 12 and suitable rivets, bolts or other suitable attaching devices being used in connection with these flanges I01 Securing said elbows l) l() together. The upper and lower ends of the drum are reinforced by means of bands [3, 1 1 which may be made of any suitable material, the drum being preferably made of sheet iron. A sliding damper 15 is arranged in the bottom of the drum and may be employed to regulate the draft through the drmn and smoke pipe, so as to control the fire in the stove or furnace, and when closed entirely serves to catch the soot. This dam per is very useful when removing the soot from the drum, and also to facilitate the removal of the soot, I provide a door 1.6 which is secured by means of hinges 17 and a :lastcuing bolt 18 to a door frame 19 which is secured on one side of the drum around an opening 20 made in the said side of the drum. Ordinarily this door will be kept closed, but when it is desired to remove the soot, the damper 15 will be first closed and the door then opened, the damper serving to catch the soot which drops from the smoke pipe, and the door facilitating the removal of the soot from within the drum, as will be understood. I also provide a door 9.]. which is hinged on a door frame 23 arranged around an opening 2-1. in the elbow .1: of the smoke pipe. This door 21, when opened, enables a suitable sc 'aper, such as shown at 25, to be used in the smoke pipe, and its elbow for scraping the soot therefrom. Ordinarily, however, the door 21 will be kept closed and fastened by means of a suitable bolt 26.

In connection with the elbow 9 which extends through the drum, I provide an air inlet pipe 27 which is attached thereto, depends therefrom and is provided with an intake bell 28 at its lower end. This air intake pipe 27 is also provided with a pivotally mounted damper 29 which has a pivot rod 30 and is provided at one end with a suitable handle 31 which enables the damper to be turned to any desired position. This damper 29 has an opening 32 which provents the passage 01 air through the air pipe from being entirely out 0d". The air pipe also has sections 33 and an elbow 3-1 arranged in and passing through that portion of the smoke pipe which is above the drum. The air pipe is of materially less diameter than the smoke pipe, so that it does not obstruct the smoke pipe or affect the draft of the stove or furnace, and yet by reason of the location of the air pipe in the smoke pipe, the air which passes up through the air pipe is heated by the smoke, hot air and heated products of combustion in the smoke pipe, as will be readily understood. A register 35 is indicated at a convenient point in the building, with which register the air pipe communicates, and through which the air pipe discharges the air heated therein into the building or apartment. Any desired number of registers may be employed, according to the capacity of the heating apparatus, and they may be located at any desired point.

While I have herein shown and described a preferred form of my invention, I would have it understood that changes may be made in the form, proportion, and construction of the several parts, without departing from the spirit of my invention, and within.

through the smoke pipe arranged therein and including an elbow arranged in the drum and passing through one side thereof.

2. Heating apparatus of the class described, comprising in connection with the smoke pipe of a stove, a drum having its top and bottom connected to the smoke pipe and, having an opening in one side, and a closure for said opening and also provided with a slide damper in its bottom movable to open or closed position with relation to the smoke pipe, and an air pipe passing through the smoke pipe arranged therein and including an elbow arranged in the drum and passing through one side thereof, the said air pipe being provided with a regulating damper.

3. A drum for use in connection with the smoke pipe of a stove having connectors in its top and bottom and also provided at the bottom with a. slide damper movable to open or closed position, with relation to the bottom connector and having an operating rod extending through one side of the drum, the drum being further provided with an opening in one side at the bottom and a closure for said opening, and an air pipe for arrangement in the smoke pipe and including an elbow arranged in the drum and passing through one side thereof.

In, testimony whereof I afix my signature in presence of'two witnesses.

. FREDRICK CRAIG.

Witnesses:

CHARLEsR. SWAINE, OSCAR FOWLER.

Copies of this patent may be obtained for five cents each, by; addressing the Commissioner of Eatents, Washington, D. G. 

